How should the central air conditioner be maintained?

Spring brings warmth, central air-conditioning and short breaks ushered in the season. How should central air-conditioning be maintained?

1. Clean the filter of the indoor unit After the central air conditioner is used for a winter, a large amount of dust and foreign matter accumulate in the filter of the indoor unit, which is easy to breed viruses and bacteria. Touch the surface temperature of the evaporator. The temperature of the evaporator of a working air conditioner should be the same everywhere, and its surface is cold, generally around 15°C, and there is condensation on the exposed copper pipe elbow. The central air-conditioning maintenance touches the surface temperature of the condenser. After the air conditioner is turned on, the condenser will heat up quickly. The faster it heats, the faster the refrigeration. Under normal use, the temperature of the condenser can reach about 80°C, and the temperature of the condenser tube wall is generally 45-55°C. . The central air conditioner maintains the surface temperature of the low-pressure return air pipe. Normally, the suction pipe is cold and the exhaust pipe is hot. It should feel cold to the hand. If the ambient temperature is low, there will be condensation on the surface of the low-pressure return pipe. If the return pipe does not condense, and the high-pressure exhaust pipe is hot, the compressor shell is also very hot, which is probably a refrigerant. Insufficient, if all the condensation on the return pipe of the compressor and half or all of the compressor casing, it means that the refrigerant is too much. If it is not cleaned in time, it will be blown into the room along with the indoor unit when it is used again, which not only affects the health, but also affects the cooling/heating effect of the central air conditioner and increases energy consumption. When cleaning the central air conditioner, take out the filter first. You can use a vacuum cleaner to clean the dust on the central air conditioner, or you can clean the filter of the central air conditioner with clean water, dry it and put it back in place, and then wipe the air outlet with a clean towel until it is clean.

2. Reopening requires a trial beforehand. Pre-cooling is required. It is transferred to the central air-conditioning refrigeration test in cooling mode in advance. The indoor temperature is set to 16℃, two hours of continuous power, air-conditioning and refrigeration. Is it normal whether the condensate drains smoothly. If there is any problem, the on-site inspection company that needs to install central air-conditioning should be contacted in time.

3. When not in use for a long time, the power should be cut off in time

When the central air conditioner is not used for a long time during the season, the power of the central air conditioner must be cut off in time .. Before the central air conditioner resumes use, check whether the ventilation aisle is blocked.. If you hear abnormal noise from the central air conditioner, you need to call a professional after-sales maintenance engineer to check. Do not force the switch to prevent damage to the machine..

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